| 摘要 |
The application refers to a process for separating out radioiodine from aqueous solutions, in which readily soluble iodine compounds act as a carrier for the radioiodine, which is converted and absorbed in the presence of a highly porous filler promoting filtration. To carry out the conversion, the solution is adjusted to a pH < 4, preferably 2 to 3. The acidic solution is then reacted with a substance sparingly soluble in an acidic environment. This substance can be a heavy metal salt sparingly soluble in an acidic environment. The radioiodine is converted in this case into the heavy metal iodide, the solubility product of which is less than that of the heavy metal salt used. In a second solution, the acidic solution is passed through a mixed bed of activated charcoal and an oxidising agent sparingly soluble in the acidic environment, preferably brownstone, in which the radioiodide is transformed into the water-soluble iodine/iodide complex and this is adsorbed to the activated charcoal. <IMAGE>
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